(19)

(11)

EP 1 159 806 A2

(12)

(88) Date of publication A3: 18.01.2001 (43) Date of publication: 05.12.2001 Bulletin 2001/49 (21) Application number: 00913836.3 (22) Date of filing: 09.03.2000

(51) International Patent Classification (IPC)7: H04L 12/64, H04M 7/00, H04L 12/28 (86) International application number: PCT/US0006/142 (87) International publication number: WO 0054/468 (14.09.2000 Gazette 2000/37)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 10.03.1999 US 124321 P 20.12.1999 US 466948 (71) Applicant: Inet Technologies, Inc. Plano, TX 75075 (US)	(72) Inventors: PATTERSON, Timothy, K. Allen, TX 75013 (US) KIRK, Chris, Edwin Van Alstyne, TX 75495 (US) BIDULOCK, Brian, Frederick, George Plano, TX 75093 (US) (74) Representative: Jackson, Richard Eric et al Carpmaels & Ransford,43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)